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  • 1
    Electronic Resource
    Electronic Resource
    Inexpensive automatic Weiss extraction system (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 342-346 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An inexpensive yet reliable and convenient Weiss extraction system involving a magnet of maximum field strength of 8.9 kOe and a signal collection system coupled to an Apple II computer is described. The data obtained using such a system for H2S and AsH3 adsorption on Ni/SiO2 catalysts are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140201
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Oxidative coupling of methane over LaF3/La2O3 catalysts (1994)
    Springer
    Catalysis letters 23 (1994), S. 377-386 
    Details
    ISSN: 1572-879X
    Keywords: Oxidative coupling of methane ; LaF3 ; La2O3 ; rhombohedral LaOF
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract We studied the oxidative coupling of methane over the LaF3/La2O3 (50∶50) catalyst. The catalyst was found active even at 873 K. At 1023 K, the C2 yield was 12.7% at 26.0% CH4 conversion and 49.1% C2 selectivity. It was found to be stable and had a lifetime not less than 50 h at 1023 K. The catalyst was effective in C2H6 conversion to C2H4. XRD results indicated that the catalyst was mainly rhombohedral LaOF. It is suggested that the catalyst has ample stoichiometric defects and generates active oxygen sites suitable for methane dehydrogenation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00811372
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    An ab initio study of methane activation on lanthanide oxide (1997)
    Springer
    Catalysis letters 49 (1997), S. 53-58 
    Details
    ISSN: 1572-879X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Ab initio MP2 calculations have been carried out to study the activation of methane on lanthanide oxide La2O3. O- and O2 2- are assumed to be the active species on the oxide surface. The possible roles of O2- and O2 4- on the oxide surface in C-H bond activation are also investigated. It is shown that the CH4 oxidative dehydrogenation occurs much more readily on O- and O2 2- than on O2- and O2 4-. The results indicate that O- and O2 2- are the active species and therefore support the O- and O2 2- mechanisms assumed for the reactions. The promoter compound containing Br- is found to be favorable for the methane activation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019040902099
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    Paper (German National Licenses)
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